After the jump, we break down four of the biggest (and most believable) rumors we've heard and judge the likelihood they'll actually come true.

Movie: "Superman"Stars already attached: Henry CavillRole: Love interest Lois LaneLikelihood of happening: Pretty high. Even though it's just a rumor, the fact that Kristen has reportedly read for the part means that she's actually interested, not just that a studio wants the star power she'll no doubt bring.

Movie: "Snow White and the Huntsman"Stars already attached: Viggo Mortensen and Charlize TheronRole: The titular Snow WhiteLikelihood of happening: Not great. In the end, I think Universal will either opt for an unknown or the very Snow White-like Emily Browning over Kristen. Plus, since she's never done a hardcore action film like this before, it seems like a weird transition for Kristen. Then again, Universal seems to really, really want her for the part.

Movie: "The Hunger Games"Stars already attached: NoneRole: Katniss EverdeenLikelihood of happening: Nearly none. This was a fan rumor that we've seen running rampant around the Internet, but there's a whole slew of other actresses with a much better chance of landing the role. Also, there's pretty much no way in the world that Kristen will sign on to another young adult franchise right after she's come off "The Twilight Saga." (Not to mention most "Hunger Games" fans would lose their you-know-what if she was cast!)

Movie: "Wanted 2"Stars already attached: James McAvoy (reportedly)Role: Unnamed female leadLikelihood of happening: We still aren't sure. This rumor is almost a year old, but Mark Millar (creator of the "Wanted" comic book) told MTV Splash Page that there had been some conversations between their camp and Kristen's. Still, the script for a second film isn't finished yet, so we'll see if Kristen is still interested by the time it is.